-5.04% is the change from 615 to 584
Calculation steps:
[( 584 - 615 ) ÷ 615] x 100 = -5.04%
Formula
Percentage change = [(584 - 615) / 615] x 100
Subtract the new number by the original number
584 - 615 = -31
-31 ÷ 615 = -0.05040650406504065
-0.05040650406504065 x 100 = -5.04%